Solving algebraic equations with negative exponents

  • #1
solve for x: x^-2 = 1/9



solve for x: x^-2 - 13x^-1 +36 = 0



I don't understand how to solve either equations.

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Homework Equations





The Attempt at a Solution

 

Answers and Replies

  • #2
Mentallic
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Remember that [tex]x^{-a}=\frac{1}{x^a}[/tex] so try multiplying through by x2 in both.
 

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